287648320939 has 16 divisors (see below), whose sum is σ = 348109023168. Its totient is φ = 232032172032.

The previous prime is 287648320937. The next prime is 287648320963. The reversal of 287648320939 is 939023846782.

It is not a de Polignac number, because 287648320939 - 2¹ = 287648320937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (287648320931) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1347267 + ... + 1546099.

It is an arithmetic number, because the mean of its divisors is an integer number (21756813948).

Almost surely, 2^287648320939 is an apocalyptic number.

287648320939 is a deficient number, since it is larger than the sum of its proper divisors (60460702229).

287648320939 is a wasteful number, since it uses less digits than its factorization.

287648320939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211014.

The product of its (nonzero) digits is 31352832, while the sum is 61.

The spelling of 287648320939 in words is "two hundred eighty-seven billion, six hundred forty-eight million, three hundred twenty thousand, nine hundred thirty-nine".